How good is HD supposed to be?
Dave Lambley
dave at lambley.me.uk
Fri Apr 29 04:39:22 PDT 2016
On 29 April 2016 at 00:57, Dave Liquorice <allsorts at howhill.com> wrote:
> On Thu, 28 Apr 2016 07:07:33 -0500, artisticforge . wrote:
>
>
>>>> NB hvfhd DOES NOT OFFER HIGHER RESOLUTION (CLARITY), only doubled
>>>> framerate (25FPS x2), which results in smoother scenes where motion is
>>>> involved!
>>>
>>> How does repeating frames improve smoothness of movement? Or does this
>>> encode upscale each field(*) and encode that to increase the temporal
>>> resolution?
>>
>> It is the frames per second that provide the human eye with the
>> persistence of vision, the illusion of motion.
>
> I could show you 100 fps but if there where only 4 different images
> displayed the illusion of motion would be no smoother than 25 fps. You only
> get smoother movement by increasing the number of different images
> displayed.
>
> So if this hvfhd only repeats each frame to get a higher frame there is no
> increase in smoothness. How ever if they take each field, upscale it and
> encode as a frame that would inrease the smoothness.
I believe the frame repeating idea is a red herring. Real 50 frame/s
computer video is a thing which exists. If your browser's up to it you
can see for yourself here,
https://www.youtube.com/watch?v=PmNapQdWFKg
You'll need to choose one of the "p50" resolutions on the Quality menu.
Dave
More information about the get_iplayer
mailing list